If you're talking about the Maximium Volume Limit:
Setting the Maximum Volume Limit
You can set a limit for the maximum volume on iPod shuffle. You can also set a
password in iTunes to prevent this setting from being changed by someone else.
If you’ve set a volume limit on iPod shuffle, the status light blinks orange three times if
you try to increase the volume beyond the limit.
To set the maximum volume limit for iPod shuffle:
1 Set iPod shuffle to the desired maximum volume.
2 Connect iPod shuffle to your computer.
3 In iTunes, select iPod shuffle in the Source pane.
4 Click the Settings tab.
5 Select “Limit maximum volume.”
6 Drag the slider to the desired maximum volume.
The initial slider setting shows the volume the iPod shuffle was set to when you
selected the “Limit maximum volume” checkbox.
7 To require a password to change this setting, click the lock and enter a password.
If you set a password, you must enter it before you can change or remove the
maximum volume limit.
Note: The volume level may vary if you use different earphones or headphones.
To remove the maximum volume limit:
1 Connect iPod shuffle to your computer.
2 In iTunes, select iPod shuffle in the Source pane.
3 Click the Settings tab.
4 Deselect “Limit maximum volume.”
Enter the password, if required.
Note: If you forget the password, you can restore iPod shuffle. See “Updating and
Restoring iPod shuffle Software” on page 26 for more information.
